Xavier Dolan Director, Screenwriter, Producer Kit Harington John F. Donovan Actor Natalie Portman Sam Turner Actor Jacob Tremblay Rupert Turner Actor Susan Sarandon Grace Donovan Actor Kathy Bates Barbara Haggermaker Actor Thandiwe Newton Audrey Newhouse Actor Ben Schnetzer Rupert Turner (Adult) Actor Amara Karan Mrs. Kureishi Actor Chris Zylka Will Jefford Jr. Actor Jared Keeso James Donovan Actor Emily Hampshire Amy Bosworth Actor Sarah Gadon Liz Jones Actor Michael Gambon Narrator Jacob Tierney Screenwriter Nancy Grant Producer Joe Iacono Producer Lyse Lafontaine Producer André Turpin Cinematographer Mathieu Denis Film Editing Gabriel Yared Original Music Anne Pritchard Production Design Henrich Boraros Art Director Jana Chovancova Set Decoration Michele Clapton Costume Design Pierre-Yves Gayraud Costume Design Carmen Cuba Casting